The author has conducted several research projects on the economic impacts of tourism. Recently she had completed a national research on the economic impacts of health tourism developments in Hungary. The first stage of this research was based on development projects in eleven cities/towns and was completed in 2004. This research was followed up with a control study in 2009. This paper will summarize the main economic impacts of thermal bath/aqua park and wellness hotel developments (started in 2001). The primary research on the economic impacts of health tourism developments focused on the multiplier effect of tourism investments at local level and examined the economic impact of the new projects' operations, such as, tourism demand flow, income generation, job creation at local and national level. Results of this research may convince market players on importance and efficiency of health tourism developments.